Dec 30, 2017; Las Vegas, NV, USA; Khalil Rountree lands a kick against Michal Oleksiejczuk during UFC 219 at T-Mobile Arena. Mandatory Credit: Gary A. Vasquez-USA TODAY Sports Dec 30, 2017; Las Vegas, NV, USA; Michal Oleksiejczuk moves in with a hit against Khalil Rountree during UFC 219 at T-Mobile Arena. Mandatory Credit: Gary A. Vasquez-USA TODAY Sports Dec 30, 2017; Las Vegas, NV, USA; Khalil Rountree moves in with a hit against Michal Oleksiejczuk during UFC 219 at T-Mobile Arena. Mandatory Credit: Gary A.